Abstract: Objective: To probe into influence of psychological capital and achievement motivation on ICU male nurses' Vocational delay of gratification. Methods: A total of 109 nurses from 16 general hospitals in Guangdong were investigated with psychological capital scale, achievement motivation scale, and vocational delay of gratification questionnaire. Results: The mean score of vocational delay of gratification was 19.79±5.29. The mean score of psychological capital was 45.21±5.02. The mean score of achievement motivation was 4.34±6.14. Regression analysis showed that there were significant positive correlation among marriage, income, professional title, optimism, pursuit of success and vocational delay of gratification. Conclusion: The level of vocational delay of gratification is still low. Maintaining optimistic attitude and strengthening motivation for succeed is an effective approach to enhance nurses' vocational delay of gratification.